Type-writing machine.



J. A. RENNIE.

TYPE WRITING MACHINE.

APPLICATION FILED DBO. 21, 1910.

Patented Mar. 24, 19M

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ll'l llll) @TAaTlEd PATENT 'OlE lfO.

JOHN A. RENNIE, OF LYNDHURST, NEW JERSEY, ASSIGNOR T UNDERWOOD TYPE-WRITER COMPANY, OF NEW YORK, N. CORPORATION OF DELAWARE.

TYPE-WRITING MACHIN E.

Specification of Letters Patent.

Patented Mar. 2,41, 191%.

To all whom it may concern.

vBe it known that 1,.JOI-IN A. RENNIE, a

citizen of the United States, residing in Lyndhurst, in the county ofBergen and State of New Jersey, have invented certain new and usefulImprovements in Typeriting ll lachines, of which the following is aspecification.

This invention relates to platen shifting or displacing mechanisms fortypewriting machines to facilitate the insertion and ad justment of padsor sheaves of sheets around the platen. t

It constitutes an improvement .on the device disclosed in theapplication of Alfred F. F, Kurowski, filed Oct. 27, 1910, Serial No.589,455.

One object of the present invention is to enable the platen displacementoperation to be easily and quickly accomplished without necessitatingcare in the adjustment of the platen; to which end an abutment,controlled by the usual pressure roll release mechanism, is shifted intothe path of a stop turning normally. with the platen,

whereby the operator need only shift orjdis 'of the platen relatively tothe axis. The

platen is normally locked to its axle. A lever may be operated torelease the locking latch and subsequently swing the platen upwardly onits hinge or fulcrum.

Other objects and advantages Will herelnafter appear.

In thearcompanying drawings, Figure 1' is a, perspective, showing theinvention aplockingand displacing mechanism in normal position. Fig. 3is a front view partly in section of the mechanism applied to theplaten. Fig. 4 is an end view, showing the platen lifted or displaced.Fig. 5 isa detail section on line XX of Fig. 6, showing the manner ofhinging the platen to the axle. Fig. 6 1s a platen head.

A platen axle 1 extends through a platen 2 and-is journaled in the ends3 of a platen frame, said ends being connected by a paper shelf at and atie rod 5. Bear and front pressure rolls 7 and 8 cooperate with theplaten to feed the sheets around beneath the platen and up infrontthereof.

The platen is hinged at its opposite ends eccentrically of its axis onpivots 9, mounted in arms or supports 10, the latter fast to the axle 1.This construction permits the platen to'swing upwardly to facilitate theinsertion of work sheets. Heads 11 secured to the platen ends areslotted at 12 (Fig. 6) concentric with the'hinge or fulcrum points 9;

said slots extend downwardly from the axis of the platen and the axle-1of the platen passes through them. Normally the platen is centeredrelatively to the axle (Fig. 2) and locked thereto by latches 13 mountedon a shaft 14 extending longitudinally of the platen and ournaled in theheads 11. Teeth 15 on said latches enter notches 16 formed in keepers 17fast to the axle, and preferably formed integral withthe hinge arms 10.This locking action takes place at points remote from the axle 1,thereby affording stability to the platen, since any shake is notmultiplied. A spring 18 holds the latches engaged with the keepers.

To displace the platen, the operator first depresses a finger piece 19,journaled in one of the platen frame ends 3, which operates through theusual crank 20, link 21 and cam shaft 22 to cast offthe pressure rolls 7and 8 against the tension of springs 23. The depression of the fingerpiece 19 rocks an elbow lever 24, 25 supported on the tie rod 5, one arm24 of which is connected to the crank 20, whereby to shift an abutment26 the the latch from ics'keeper 17. 'Thisr oclis the shaft- 14 torelease the latchat' the opposite end of the platen.- I

The releasing throw ofthe latches is lim-.

itedby. a stop 35, struck by one' of said latches prior to thecompletion of thestroke of the lifting-lever 28, further movement ofwhich'continues to pre'ss the hooked end '33 of the dog a 'ainsttlie lugto swing the platen'u'pwar ly on its hinges or fulcrums;

'on which may strike 'one of the platen frame ends 3 at-which time, thepivotal connection .32 between the dog 31 and arm 30 has describedan'arc'about the pivotal point29 of the lever (see Figs. 2 and 3) untilit lies on the opposite side thereof, having passed the straight lineposition whereby. to lock the platen in elevated position. The pad ofsheets is then inserted .in the machine, after which the lever 28 isreturned to normal position '(Fig. 2) .to release theiplatn andthelatch. A spring 38 holds the dog normally,

idle and may assist in maintaining the lever :28 in locked position,whenjthe' lever is' shifted. The platen may now swing back by gravity toa position concentric Wlth' the axle, the teeth 15 ofthe latchesridingon guide faces 37 ofthe keepers 17 until they reach thenotches 16 intowhich the are snapped-by returning-spring 18. The nger piece 19 is thenreturned to place to restore the pressure rolls? and 8 and remove theabutment 26 from-the path of stop 27, leav-. ing the platen free toturn.

Variations may b'e'rjesorted to within the scope of the invention, andportions of the.

- improvements may be used without others.

- claim:

axle journaled therein, of a platen, a pivot.

supported in said frame therefor eccentric 1. In-a typewriting machine,thecombi nation with 'a platen frame, and a platen of the-ends of theplaten, a, movable latch position to release the platen, and means toswingthe platen on said pivotalsupport.

2. Ina typewriting machine, the combi-.

nation with a platen frame, and a platen axle journaled therein, of aplaten, arms fast-on the axle and plvotally-connected to the plateneccentrically thereof, a latch to lock the platen to the axle to turntherewith, and means to release the latch and swing. the platen on itspivotal connection with the arms relatively to the frame.

3. In-a typewriting machine, the combiipaosvs;

lipp'ing off as nation with a platen fraine and a platen axle.journaled' therein, of a platen pivotally supported eccentrically of itsends, means to lock the platen to the axle so as to turn" therewith,means tov arrest the rotation of the platen, and means to swing theplaten on -to '10ck the platen against swinging,pres-' sure rolls, meansto cast off and return said rolls, anabutment shiftable by the releaseof the rolls, into the path of a stop norm'al-lyv turning with theplaten to arrest the platen,':

andimeans to release'ftlie 'platen' fro'mits axle and to swing theplaten relatively to the frame;

In a-typegvriting' machine, the combif nation with a filaten frame anda. platen axle journaled erein, of apla.tenpivotally connected to theaxle to swingeccentrically thereof, locking means'to fasten: the platenconcentric to the axle, a stop normally'turning with the platen,.anabutment shiftable into the path of the stop to-arrest the platen, andmeans to release the platen from its axle and to swing the platenrelatively to the frame.

6. In a I nation with a platen frame and a platen axle journaledtherein,of *fulcruming arms on the axle,a platen hinged on the arms and.

having slots concentric with its hinge and typewriting machine, thecombi- I leading from the axis, said-axle enteredin saidslots, means tolock the platen to the axle concentrically therewith toturn "with theaxle, means to arrest the platen, and

means to release the'platen from its axle and swing it eccentricallythereof'and'relatively .to the frame. Having thus described my.invention, I

7. Ina *typewritingmachine, the combination. with a axle journalederein, of a 'laten'normally concentric with the axle, a'n pivotallyconnected therewith-at points ,eco'entricto the axle, a latch ontheplaten, a keeper on the axle engaged by thelatch tolock the platenconcentrically with the axle, means to arrelease the latch anddisplace-the platen eccentricall'y oft-he. axle and relatively to theframe.

'8. In a typewriting-machine, the combiplaten frame: and 'a platen. t

re st the rotation of-the platen, and means t nation with av 'latenframe and; a platen; I

axle journaled t erein,"o f aplaten normall concentric with the axle,and. pivotally connected therewith at points eccentric to theax'le,means to lock the'platen concentrica l v with the axle to turntherewith, a stop 11 rmally turning with the platen, pressure rollsfor'the-platen,casting off and resuming mechanism therefor, including afingerl which said axle passes, fulcruming arms on piece, an abutmentshifted by said fingerpiece into the path of said stop when the rollsare cast off, and means to release the lock and displace the plateneccentrically of the axle and relatively to the frame.

t). In a typcwriting machine, the combination with a platen frame andaplaten axle journaled therein, of a platen normally concentric with theaxle, and pivotally connected therewith at points eccentric to the axle,means to'lock the platen concentrically with the axle to turn therewith,a stop normally turning with the platen, pressure rolls for the platen,casting off and re storing mechanism therefor, including a finger-piece,an elbow lever having a normally idle abutment operated by saidfinger-piece to shift the abutment into the path of the stop when therolls are cast off, and means, to release the lock and displace theplaten. eocentricallyof the axle and relatively to the frame.

10. In a typewriting machine, the combination with a platen frame and aplaten axle journaled therein, of a platen normally rimcentric with theaxle, and pivotally connected therewith at points eccentric to the axle,means to lockthe platen concentrically with the axle to turn therewith,a stop normally turning with the platen, an elbow lever having anormally idle abutment to be entered in the path of the stop, and means.

to release the lock anddisplace the platen 'eccentrically of the axleand relativelyto the frame. e

11. In a typewriting machine, the combination with a platen frameand aplaten axl journaled therein, of a platen through which said axlepasses, fulcrnming arms on .the axle pivotally supporting. the plateneccentrically thereof, means to lock the platen to the axle to turntherewith, a stop connected to the axle, an abutment shiftablc into thepath of the stop to arrest the rotatable platen, andmeans to release theplaten from its axle and displace said platen eccentrically of said axleand relatively to A the frame.

nccted'therewith at points eccentric to the axle,'means to lock the p12"3n concentrically with the axle to turn therewith, a stop normallvturning with the. platen, an abutment shiftable into the path of thestop to arrest the rotatable platen, and means to release the platenfrom its axle and displace said platen eccentrically of said axle andrelatively to the frame;

13. In'atypewriting machine, the combi: nation with a platen frame and aplatcnaxle journaled therein, of a platen .throngh /thc axle pivotallysupporting the platen eccentrically thereof, means to lock the platen tothe axleto turn therewith, a stop connected to one of said fulcrumingarms, an. abutment shiftable into the path of the stop to arrest therotatable platen, and means to release the platen from its axle anddisplace said platen eccentrically of said axle and relatively to theframe.

14. In a typewriting machine, the combination with a platen frame and aplaten axle jonrnaled therein, of a platen normally concentric with theaxle and pivotally con- 'nected therewith at points eccentric to theaxle. a latch secured eccentrically of the platen end and shiftable in aplaneparallel therewith, and a keeper on the axle to lock the platenconcentrically thereof, means to arrest the platen and prevent itsrotation, and means to release said'platen from its axle and swing itecce'ntrically thereof and relatively to the frame.

15. In a typewriting machine, the combination with a platen frame and aplaten axle 'journaled therein, of a platen normally concentric with theaxle and pivotally con- 'nected therewith at points eccentric to theaxle, a latch secured eccentrically of the platen end and shiftable in'a plane parallel therewith, and a keeper on the axle to lock the platenconcentrically thereof, and having a guiding face for said latch whenreleased, means to arrest the platen and prevent its rotation, and meansto release said platen from its axle and swing it eccentritally thereofand relatively to the frame,

'- 16. In a typewriting machine, the combination with a platen' frameand a platen,

relatively to the frame.

- 17 In a typewriting machine, thecombination with a platen frame and aplaten axle ournaled therein, of a platen through which said axlepasses, fulcruming arms on said axle ,pivotally connected to the platencccentrically thereof, said arms having notches,

latches-on the platen to enter the notches and lock the platen fast tothe axle, a stop on one of said arms normally turning with the platen,an abutment shiftable into the,

path of the stop, to arrest the platen and prevent rotation thereof, andmeans to re-' lease the platen from its axle and swing it on its pivotalsupports relatively to the frame.v

18. In a typewriting machine, the combination with a platen frame and aplaten axle journaled therein, of a platen normally concentric with theaxle, and pivotally con nected therewith at points eccentric to theaxle, means to lock theplaten to the axle to turn therewith, means toarrest the platen, and lifting mechanism to engage that portion of thelockin means on the platen, to release the platen from the axle and toswing it on its pivotal'supports' relatively to the frame.

19. In a typewriting machine, the combination with a platen frame and aplaten axle mounted therein, of a platen pivotally supportedeccentrically of its axis and loose on the axle, means to lock theplaten to its axle concentrically therewith to turn with the axle, meansto arrest the platen, a lever on the frame, and a dog operated by thelever to release the platen from its axle and swing said platen on itspivotal supports relatively to the frame.

21. In a typewriting machine, the combination with a platen frame and aplaten axle mounted therein, of a platenpivotally supportedeccentrically of its axis and loose on the axle, means to lock theplaten to its axle concentrically therewith to turn with the axle, meansto arrest the platen, a lever on the frame, and a dog operated by thelever to release the platen from its axle and swing said platen on itspivotal supports relatively to the frame, said dog and lever being soconstructed and their pivots being so ar ranged that the platen isretained in displaced position at the end of the platen releasingstroke.

22. In a typewriting machine, the combination .with a platen frame andan axle mounted therein, of a platen loosely mounted relatively to theaxle and hinged eccentrically of its axis, means to lock the platen tothe axle to turn therewith, means to arrest the platen, a lever pivotedto the frame, a dog hinged to the leverto release the platen from itsaxle and swing it on its hinge, said hinge connection between the dogand lever passing from one side to the other of the pivotal support ofthe lever to lock the platen in displaced position.

23. In a typewriting machine, the cOmbi nation with a platen frame andan axle mounted therein, of a platen loosely mounted relatively to theaxle and hinged eccenlock the platen in displaced position, and a springto assure such locking of the platen and to return the dog to idleposition.

24. In a typewriting machine, the com bination with a platen frame andan axle mounted therein, of a platen loosely mounted relatively to theaxle and hinged eccentrically of its axis, a. pivoted latch to lock theplaten to the axle to turn therewith, means to arrest the platen, alever pivoted to the frame, and a dog engaging the pivoted latch torelease the platen from the axle.

In a typewriting machine, the combination with a platen frame and anaxle mounted therein, of a platen loosely inounted relatively to theaxleand hinged eccentrically of its axle, a latch to lock the platen tothe axle to turn therewith, a dog engaging thelatch to release theplaten from its axle, said dog hooking onto the latch, a stop engaged bythe latch when released to arrest the latch and enable the dog bypresure thereagainst to swin the platen on its hinges relatively to theframe, anda lever controlling the dog. j i

26. In a typewriting machine, the combination with a platen frame and anaxle mounted therein, of a platen loosely mounted relatively to the axleand hinged eccentrically of its axis, means to lock the platen to theaxle, a stop at the hinge to turn with the platen, an abutment shiftableinto the path of the stop, and means to release the platen from the axleand to swing said platen on it hinges relatively to the frame.

27. In a typewritingmachine, the combination with a -platen frame and aplaten axle mounted therein, of a platen pivotally supportedeccentrically of its ends, keepers fast on the axle, latches mounted atopposite ends of the platen to engage the keepers and lock the platenconcentric with the axle, a shaft connecting the latches, and .means torelease the latches and swing the platen on1 its pivot relatively to theframe and ax e. i

28. In a typewriting machine,' the combination with a platen frame and aplaten axle mounted therein, of a platen pivotally supportedeccentrically of its ends, means to lock the platen to the axle atpoints remote "from the-latter and adjacent. the periphery pf saidplaten, and means to release the locking means andswing the platen onits pivot relatively to the frame and axle.

29. In a typewriting machine, the combi- Lea ers in lifted positionowing to the passage ofv the line of pull of the dog past the leverfulcrum, the return of said platen to normal position being securedsubsequently to the release of the dog from the latch by a followeroperated from said finger-piece which also removes the abutment from thepath of the stop.

30. In a typewriting machine, the combination with a platen frame and aplaten axle mounted therein, of a rotatable platen adapted to be shiftedtransversely of its axle, a stop on the platen for arresting said platenin position to be shifted, a second step on the platen, and an arm onthe frame to seize said second stop to turn the platen around said firststop as a fulcrum to shift the platen transversely. i

. 31. In a typewriting machine, the combi nation with a platen frame anda platen axle mounted therein, of a rotatable platen adapted to beshifted transversely of its axle, a stop on the platen for arrestingsaid platen in position to be shifted, pressure rolls, means to releasesaid rolls, a stop set by said roll releasing means to cotiperate withsaid platen-stop, a second step on the platen, and an arm on the frameto seize said second stop to shift the platen on said first-platen stopas a fulcrum. v

In a typewriting machine, the combi nation of a platen cylinder, aplaten shaft,

means for shifting the platen transversely of the shaft when the platenis in a pre-= determined angular position, a stop on the platen, andpivoted means movable into the path of rotation of said stop, wherebythe platen upon being rotated, may be arrested in the angular positionin which the shifting means is operative.

33. In a typewriting machine, the combination of a platen shiftable awayfrom its normal bearings when turned to a certain angular position, apaper pressure roll, means for throwing the latter to and from theplaten, and means controlled by said roll throwing means for arrestingthe platen in the proper angular position for shifting the same.

34. In a typewriting machine, the combination with a platen and a shaftrelatively to which it is shiftable, of a. pressure roll:

for said platen, means for moving said roll from the platen, a stop onthe platen, and an abutment for arresting said platen by its stop set bythe means moving said pressure roll away from the platen.

In a typewriting machine, the combination with a platen and an axletherefor,.of hinges eccentric to the axis of said platen, a stop'on saidplaten, a pressure roll for said platen, a key for moving said pressureroll away from said platen, an abutment set by said key for arrestingsaid platen by its stop, and a handle for shifting said platen on saidhinge when it is arrested by said step. I

36. In a typewriting machine, the co1nbination with a platen and a shafttherefor,

- center.

extension of said plate, a pressure roll for said platen, a key forcasting off said pressure roll, and an abutment moved by said key .intothe path of said stop to arrest the platen.

38. In a typewriting machine, the combination with a platen and a shafttherefor, of a plate at one end of said shaft, a pivot eccentric to theplaten by which said plate is attached to the platen, a stop forming anextension of said plate, a pressure roll for said platen, a key forcasting off said pressure roll, an abutment moved by said key into thepath of said stop to arrest the platen, a latch pivoted on theplatennormally holding the platen in position on the shaft, a lug onsaid latch, and a dog arranged to catch said lug to release said latchand then shift said platen around said stop.

39. In a typewriling machine, the combination with a platen frame and aplaten axle mounted therein, of a platen pivotally supportedeceentrically of its axis and loose on the axle, means to lock theplaten concentrically with its axle to turn therewith, means to arrestthe platen, a lever. and a dog connected thereto to release the platenfrom its axle and swing the platen on its pivotal supports relatively tothe frame, said dogso connected with the lever that its line of pullpasses from one side of the lever fulfor said platen, ofhinges-eccentric to theaxis of said platen connecting it to said shaft,mean's'for shifting said platen on said hinges, a paper pressure rollfor said platen, a key for moving said pressure roll away from theplaten, a stop on the platen, and an abutment set by said key when thepressure roll is moved from theplaten for arresting said platen bysaidstop'in the proper position for shifting the vplaten.

41. vIn a typewriting machine, the combination with a platen and ashafttherefor, of hinges connecting said platen to said shaft eccentricalh tothe axis of said platen, apressure roll for said platen, a key formoving said'pressure roll from said platen,

a stop on sald'platen, an abutment set by said e away from the platen toarrest said platen t-ively to its shaft;

y'when said pressure roll is moved moving said platen on its hingesrelatively to its shaft, and a lug on the platen adapted to be engagedby said dog for first releasing.

said latch and then shifting the platen.

42. In a typewriting machine, the combi-.-

nation with .a.platen and a shaft therefor,

of a plate piyoted eccentrically of-said platen on the platen, ,a latchfor holding the platen concentric with the shaft, a lug on said latch, apressure roll for said platen, a ,key for moving said pressure rolaway-from said platen, an abutment set 'by said keyto catch on saidplate, and amanually oper ated dog for Gatchin said lug. for releasingsaid latch and then siifting the platen rela- JOHN A. RENNIE.

Witnesses:

K. FRANKFORT, B. GOLDBERG.

co ies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patent: Wuhington, D. G.

